CN216215844U - 27.5kV railway cable connects and uses housing - Google Patents
27.5kV railway cable connects and uses housing Download PDFInfo
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- CN216215844U CN216215844U CN202122515270.4U CN202122515270U CN216215844U CN 216215844 U CN216215844 U CN 216215844U CN 202122515270 U CN202122515270 U CN 202122515270U CN 216215844 U CN216215844 U CN 216215844U
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Abstract
The utility model discloses a shielding sleeve for a 27.5kV railway cable connector, which comprises a shielding ring and a plurality of shielding teeth, wherein the shielding ring is used for being sleeved on a copper connecting pipe of the cable connector; and the shielding teeth are abutted against the joint semi-conductive tube. The cross-section of the shielding ring is circular, and a plurality of shielding teeth which are arranged along the circumference at equal intervals are arranged on the outer side of the shielding ring. The shielding teeth and the shielding ring are of an integrated structure or are welded. The shielding tooth is long-strip-shaped, the part of the shielding tooth, which is close to the shielding ring, is an arc-shaped cross section, and the part of the shielding tooth, which is far away from the shielding ring, is a plane. The outer diameter of the shielding tooth is the same as the outer diameter of the cable insulation. The shielding sleeve is arranged on the copper connecting pipe, the shielding sleeve is equidistantly distributed on the copper connecting pipe after the conductor is in compression joint, the problems are solved, the installation is simple, the safety is high, and the contact is reliable.
Description
Technical Field
The utility model relates to the technical field of cables, in particular to a shielding sleeve for a 27.5kV railway cable connector.
Background
Because of the limited length of a single cable, one or more connectors are typically required on a line to extend the length to meet the power requirements. At present, two cables are generally connected by adopting a silicon rubber cold-shrink joint. The conductors of the two cables are first crimped with a copper nipple and then the joint body is shrunk. The insulation thickness of the 27.5kV crosslinked cable for the electrified railway is 10mm, while the thickness of the copper connecting pipe is between 3 and 5mm, so that when the copper connecting pipe connects two cables, the height difference between the outer diameter of the copper connecting pipe and the outer diameter of the cable insulation is still 5 to 7mm, as shown in figure 1. Taking a 150 mm square cable as an example, the external diameter of a copper connecting pipe specified by the national standard is 22mm, while the external diameter of the insulation of a 27.5kV cross-linked cable is 39mm, and if the joint is directly shrunk without any treatment, a gap is easily formed between the joint and the cable insulation.
The current commonly used method is to wind a semi-conductive adhesive tape or adopt a metal shielding tube right above the adapter tube. The surface around the semi-conductive tape is difficult to smooth and the ends of the semi-conductive tape are easily carried into the cable insulation by the support bars. The metal shielding pipe is generally divided into an upper part and a lower part, needs to be clamped on a cable insulating layer and is complex to install.
For example, the present invention discloses "a cold press connection method of a shield sleeve assembly and a shield sleeve assembly" disclosed in chinese patent literature, and its publication number is "CN 105322409B". The cold extrusion connection method of the shielding sleeve assembly comprises the following steps: step 1: manufacturing a joint matched with the metal shielding net to be subjected to cold extrusion; step 2: manufacturing an extrusion die for placing the metal shielding net to be subjected to cold extrusion in the step 1 and the joint; and step 3: assembling the joint and the metal shielding net to be subjected to cold extrusion through a compression ring and then putting the assembled joint and the metal shielding net into the extrusion die; and 4, step 4: and (3) carrying out cold extrusion treatment on the extrusion die processed in the step (3) on a hydraulic machine by adopting a cold extrusion method, and then demoulding to obtain the shielding sleeve assembly. The cold extrusion connection method of the shielding sleeve assembly adopts cold extrusion treatment, and the shielding sleeve assembly manufactured by adopting the method has better environmental capacities of resisting humidity, heat, mold, salt mist and the like, and improves the resistance of the shielding sleeve assembly. The structure of the shielding sleeve is not described in the present invention.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems that the surface of a semi-conductive adhesive tape is difficult to smooth when the semi-conductive adhesive tape is wound right above a connecting pipe or a metal shielding pipe is adopted in the prior art, and the end head of the semi-conductive adhesive tape is easy to bring into cable insulation by a supporting strip.
In order to achieve the purpose, the utility model adopts the following technical scheme: a shielding sleeve for a 27.5kV railway cable joint comprises a shielding ring and a plurality of shielding teeth,
the shielding ring is used for being sleeved on a copper connecting pipe of the cable joint;
and the shielding teeth are abutted against the joint semi-conductive tube.
According to the utility model, firstly, the installation and installation process requirements of two cables to be connected are processed, two shielding sleeves are sleeved on a copper connecting pipe, after a conductor is crimped, the shielding sleeves are equidistantly arranged on the outer side of the copper connecting pipe of a cable joint, after the shielding sleeves are installed, the outer diameter of a shielding tooth on each shielding sleeve is the same as the outer diameter of cable insulation, and finally, a semi-conductive pipe of the upper joint and the joint insulation are installed to complete installation of the whole joint.
Preferably, the cross-section of the shielding ring is circular ring type, and the outer side of the shielding ring is provided with a plurality of shielding teeth which are equidistantly arranged along the circumference.
The shielding teeth arranged on the outer side of the shielding ring are arranged at equal intervals along a circle of circumference, and the number of the specific shielding teeth is determined according to the actual condition of the cable joint, so that the flexibility is high.
Preferably, the shielding teeth and the shielding ring are of an integrated structure or welded.
If the shielding sleeve is made of other non-magnetic metal materials, the shielding teeth and the shielding ring can be connected through welding, the integral structure can be integrally machined and manufactured, and the manufacturing method is convenient.
Preferably, the shielding teeth are long, the shielding teeth are provided with arc-shaped cross sections at positions close to the shielding rings, and the shielding teeth are provided with planes at positions far away from the shielding rings.
According to the utility model, the strip-shaped shielding teeth can prop against the joint semi-conductive tube, so that the stability of the joint semi-conductive tube is improved.
Preferably, the outer diameter of the shielding tooth is the same as the outer diameter of the cable insulation.
According to the utility model, the outer side of the shielding tooth and the outer side of the cable insulation are on the same bracket, so that the contact with the joint semi-conductive pipe is more reliable.
Preferably, the shielding ring and the shielding teeth are made of nonmagnetic metal materials, and the inner diameter of the shielding ring is 1mm larger than the outer diameter of the copper connecting pipe.
In the utility model, the metal material has no good shrinkage performance, so a gap needs to be reserved between the metal material and the metal material to ensure the clearance fit between the metal material and the metal material.
Preferably, the material of the shielding ring and the plurality of shielding teeth is a vulcanized product of a semi-conductive silicone rubber material, and the inner diameter of the shielding ring is 2mm smaller than the outer diameter of the copper adapter.
In the utility model, the inner diameter of the shielding ring is set to be smaller than that of the copper connecting pipe because the vulcanized product of the semiconductive silicon rubber material has good shrinkage performance.
Therefore, the utility model has the following beneficial effects: the shielding sleeve is adopted, so that the problems that in the prior art, the surface of the semi-conductive adhesive tape is difficult to smooth when the semi-conductive adhesive tape is wound right above the connecting pipe or a metal shielding pipe is adopted, and the end head of the semi-conductive adhesive tape is easily brought into cable insulation by the supporting strip are solved, the installation is simpler, the safety and the stability are good, and the contact is more reliable.
Drawings
FIG. 1 is a prior art block diagram;
FIG. 2 is a cross-sectional view of the shielding sleeve of the present invention;
FIG. 3 is a schematic view of the shield of the present invention installed in a cable joint;
FIG. 4 is a schematic view of the cable connector of the present invention after installation and retraction;
in the figure, 1, a cable insulator 2, a copper connecting pipe 3, a conductor 4, a shielding tooth 5, a shielding ring 6, a joint insulator 7 and a joint semi-conductive pipe.
Detailed Description
Referring to fig. 1, a conventional cable joint uses a silicon rubber cold-shrink joint to connect two cables, when the cable joint is installed, conductors 3 of the two cables are crimped by a copper connecting pipe 2, and then a main body of the joint is contracted, generally, a 27.5kV crosslinked cable insulation 1 for an electrified railway has a thickness of 10mm, and the copper connecting pipe 2 has a thickness of 3-5mm, so that a height difference of 5-7mm is formed between an outer diameter of the copper connecting pipe 2 and an outer diameter of the cable, taking a 150 mm square cable as an example, an outer diameter of the copper connecting pipe 2 specified by national standards is 22mm, and an insulation outer diameter of the 27.5kV crosslinked cable is 39mm, and if the joint is directly contracted without any treatment, a gap is easily formed between the joint and the cable insulation 1.
Examples
This example presents a 27.5kV shield for railway cable joints. Referring to fig. 2, the shield sleeve includes shield teeth 4 and shield rings 5, in this embodiment, the number of the shield teeth 4 is 4, each shield tooth 4 is arranged at an interval of 90 degrees, the shield rings 5 are mainly used for being sleeved on the copper connecting pipe 2 of the cable connector, and the shield teeth 4 and the connector semi-conductive pipe 7 form reliable contact.
Referring to fig. 2 and 3, the shielding ring 5 has a circular cross section, and 4 shielding teeth 4 connected and fixedly connected with the shielding ring 5 are equidistantly distributed along the circumference, and the shielding teeth 4 and the shielding ring 5 may be connected in an integrated structure or in a welding manner according to the difference of the materials of the shielding sleeve. Under the condition that both are made of non-metal materials, the structure can be directly integrated, and integrated processing and forming are utilized, so that the whole processing is more convenient; in the case where both are nonmagnetic metal materials, they are joined by welding.
The shape of the shielding tooth 4 is long strip, the part of the shielding tooth 4 close to the shielding ring 5 is an arc-shaped cross section, and the part of the shielding tooth 4 far away from the shielding ring 5 is a plane.
Referring to fig. 3 and 4, the outer diameter of the shield teeth 4 is the same as the outer diameter of the cable insulation 1, the inner diameter of the shield ring 5 is 1mm larger than the outer diameter of the copper nipple 2 when the material of the shield ring 5 and the 4 shield teeth 4 is a non-magnetic metal material, and the inner diameter of the shield ring 5 is 2mm smaller than the outer diameter of the copper nipple 2 when the material of the shield ring 5 and the 4 shield teeth 4 is non-magnetic.
According to the utility model, firstly, the installation and installation process requirements of two cables to be connected are processed, two shielding sleeves are sleeved on a copper connecting pipe, after a conductor 3 is crimped, the shielding sleeves are equidistantly arranged on the outer side of the copper connecting pipe 2 of a cable joint, after the shielding sleeves are installed, the outer diameter of a shielding tooth 4 on each shielding sleeve is the same as that of a cable insulation 1, and finally, a semi-conductive pipe 7 of an upper joint and a joint insulation 6 are installed to complete installation of the whole joint.
The shielding teeth 4 arranged on the outer side of the shielding ring are arranged at equal intervals along a circle of circumference, and the number of the shielding teeth 4 is confirmed according to the actual situation of the cable joint, so that the cable joint has high flexibility.
If the shielding sleeve is made of other non-magnetic metal materials, the shielding teeth 4 and the shielding ring 5 can be integrally processed and manufactured in an integrated structure, and the manufacturing method is convenient.
In the utility model, the long-strip-shaped shielding teeth 4 can prop against the joint semi-conductive tube 7, so that the stability of the joint semi-conductive tube 7 is improved.
According to the utility model, the outer sides of the shielding teeth 4 and the cable insulation 1 are on the same bracket, so that the contact with the joint semi-conductive tube 7 is more reliable.
In the utility model, the metal material has no good shrinkage performance, so a gap needs to be reserved between the shielding sleeve and the copper connecting pipe 2 to ensure the clearance fit between the shielding sleeve and the copper connecting pipe.
In the present invention, since the vulcanized product of the semiconductive silicone rubber material has good shrinkage properties, the inner diameter of the shield ring 5 is set smaller than that of the copper adapter tube 2.
The installation process comprises the following steps: the method comprises the steps of preprocessing two cables according to an installation process, selecting a proper shielding sleeve to be sleeved on a copper connecting pipe 2, crimping conductors 3 of the two cables through the copper connecting pipe 2, dividing the conductors into three parts according to the length of the copper connecting pipe 2, fixing the shielding sleeve on the copper connecting pipe 2 in an equidistance mode, installing a connector semi-conductive pipe 7 to enable the connector semi-conductive pipe to be abutted against shielding teeth 4 and cable insulation 1, and installing a connector insulation 6 to complete the whole process.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (7)
1. A shielding sleeve for a 27.5kV railway cable joint is characterized by comprising a shielding ring (5) and a plurality of shielding teeth (4),
the shielding ring (5) is sleeved on the copper connecting pipe (2) of the cable joint;
and the shielding teeth (4) are abutted against the joint semi-conductive tube (7).
2. The shielding sleeve for the 27.5kV railway cable joint as claimed in claim 1, wherein the cross section of the shielding ring (5) is a circular ring, and a plurality of shielding teeth (4) which are equidistantly arranged along the circumference are arranged on the outer side of the shielding ring (5).
3. The shielding sleeve for the 27.5kV railway cable joint as claimed in claim 2, wherein the shielding teeth (4) and the shielding ring (5) are of an integrated structure or are welded.
4. A shield sleeve for 27.5kV railway cable connector according to claim 1, 2 or 3, characterized in that the shield tooth (4) is long, the shield tooth (4) near the shield ring (5) is of circular arc section, and the shield tooth (4) far from the shield ring (5) is of plane.
5. The shield sleeve for the 27.5kV railway cable joint as claimed in claim 1, wherein the outer diameter of the shield teeth (4) is the same as the outer diameter of the cable insulation (1).
6. The shield sleeve for the 27.5kV railway cable joint as claimed in claim 1, wherein the material of the shield ring (5) and the plurality of shield teeth (4) is a non-magnetic metal material, and the inner diameter of the shield ring (5) is 1mm larger than the outer diameter of the copper adapter (2).
7. The shield sleeve for the 27.5kV railway cable joint as claimed in claim 1, wherein the material of the shield ring (5) and the plurality of shield teeth (4) is a vulcanized semi-conductive silicone rubber material, and the inner diameter of the shield ring (5) is 2mm smaller than the outer diameter of the copper adapter (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122515270.4U CN216215844U (en) | 2021-10-19 | 2021-10-19 | 27.5kV railway cable connects and uses housing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122515270.4U CN216215844U (en) | 2021-10-19 | 2021-10-19 | 27.5kV railway cable connects and uses housing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216215844U true CN216215844U (en) | 2022-04-05 |
Family
ID=80884632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122515270.4U Active CN216215844U (en) | 2021-10-19 | 2021-10-19 | 27.5kV railway cable connects and uses housing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216215844U (en) |
-
2021
- 2021-10-19 CN CN202122515270.4U patent/CN216215844U/en active Active
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